An ACDelco GM Original Equipment Brake Light Switch is a GM-recommended replacement for your vehicle?s original component. It is electrically powered and causes the brake lights to engage when the brakes are applied. This original equipment brake light switch has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Work with vehicle electronics to help optimize vehicle capabilities GMrecommended replacement part for your GM vehicles original factory component Offering the quality, reliability, and durability of GM OE Manufactured to GM OE specification for fit, form, and function